Improvement in steam-engines



c. DUECKER.

STEAM-ENGINE. S N' .178,1Z5 I Patented May 30,1876.

WITNESSES ATTORNEY NJEIERS, PHOTO-UTHOGRAPHER, WASNKNGTON. D C- WM AUNITE STATES PATENT OFFICE.

CONRAD DUEGKER, 0F TAMAROA, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHT TODEWITT (I'BARRER, or SAME PLACE.

IMPROVEMENT m STEAM-ENGINES.

Specification forming part of Letters Patent No. I 78,125, dated May 30,1876; application filed April 29, 1876.

To all whom it may concern:

Be it known that I, CONRAD DUEGKER, of

'Tamaroa, in the county of Perryand State of clear, and exactdescription of the constructlon and operation of the same, referencebeing had to the annexed drawings, making a part of this specification,and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a top view of myimproved engine, and Fig. 2 is a longitudinal vertical section thereof.

This invention has relation to improvements in steam-engines; and itconsists in the arrangement and novel construction of the variousdevices used, whereby very important results are obtained, as will behereinafter more fully set forth and claimed.

In the annexed drawings, the letter A designates the frame or bed of anengine. B is a fly-wheel, mounted in suitable bearings there in, andprovided with the usual crank-arm O. D represents a metallic pitman, oneend of which is connected in the customary manner to the said crank-armand the other to a vertically-vibrating arm, E, of suitable length,which arm is keyed or otherwise suitably secured to a rock-shaft, F,having its bearings in upright standards G, erected on the enginefraine.H indicates a second pitman, one end of which is pivoted to across-head, I, reciproeating in guides J, secured upon the engineframe,so as, to have vertical vibration. The other end of pitman H isbifurcated, and is connected pivotally to pitman D, somewhat nearerits-wrist-pin connection with the crankarln than to thevibrating arm E,the said pit man having been first brought in line with the cross-headand cylinder. Even should the latter be somewhat below or above thecrosshead and pitman H, the engine would still be operative. I

From the vibrating arm E the cut-off may be worked by applying linkmotion to the cutoff or stem-rod, thus doing away with eccentrics. Theengine may also be reversed from this point; and I may, by theapplication of a simple crank-arm upon the rock-shaft F,

actuate a pump for supplying feed-water to the boiler, and for otherpurposes.

It will be evident at a glance that the crank will-be thrown down fasterthan upward when a fly-wheel is not used; but by its employment the upand. down motions of the said crank will be equalized, and its movementsmade regular.

By the employment of the subsidiary pitman D and therocking arm E, thepower exercised by the cylinder is considerably increased, and thefacility with which the deadcenters are passed, the-two pitmen being atdifferent angles, greatly added to.

In practice, I may sometimes form a slot in the upper end of pitm'an,and apply therein an adjustable box or bearing. By this construction Iam able to adapt my improvement to cylinders of any length.

It is evident that my improvement'may be applied to every description ofengine, whether horizontal or upright, stationary or locomotive.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a steam-engine, the subsidiary pitman D, pivoted to the crank-armat one end, and at the other to a vertically-vibrating rocking arm, E,in combination with the pitman H, pivoted to pitman D, substantially asspecified.

2. The subsidiary pitman- D and rocking arm E, in combination with theactuating-pitman H, cross-head I, crank G, and fly-wheel B,substantially as specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses;

CONRAD DUEOKER. Witnesses:

CHAS. PRIcE,

H. G. WILDY.

